Grinding-machine.



N0. 636,l92. Patented 001. 3I, I899. I

.H. W. BOLENS.

GRINDING MACHINE. A iicmon filed Apr. 22, 1899.) .QNo Model.) 2Sheets-Sheet I.

WNITED STATES HARRY WV. BOLENS, OF PORT WASHINGTON, WISCONSIN.

GRINDING-MACHINE.

srEcIFIcATIoN forming part of Letters Patent No. 636,192, dated October31, 1899.

Application filed April 22, 1899. Serial No. 714,007. (No model.)

To all whmn it ntay concern.-

Be it known that I, HARRY W. BoLENs, a citizen of the United States, anda resident of Port Washington, in the county of Ozaukee and State ofWisconsin, have invented certain new and useful Improvements inGrinding-Machines; and I do hereby declare that the following is a full,clear, and exact description thereof. I

My invention has for its main object to provide a simple economicalhigh-speed grinding-machine especially designed for sharpeningknife-sections of mower and reaper sicklebars, but which may be readilyconverted into a machine for grinding the ledger-plates of mower andreaper finger-bars, barrow-disks, and various other devices employedabout a farm. Said invention therefore consists in certain peculiaritiesof construction and combination of parts hereinafter particularly setforth with reference to the accompanying drawings and subsequentlyclaimed.

Figure 1 of the drawings represents a perspective view of my improvedgrinding-machine; Fig. 2, an illustration that combines a full-linepartly-sectional showing, indicated by line 2 2 in the succeedingfigure, and a dotted-line diagram of a grinding-wheel and its drive-gearwhen the machine is converted from a grinder for sickle-barknife-sections into a grinder for barrow-disks or finger-barledger-plates, the organization of the machine being such that saidwheel and gear could not be made to appear in this showing except bydotted lines; Fig. 3, a transverse sectionindicated by line 3 3 in thesecond figure; Fig. 4-, a detail transverse section indicated by line 4:4 in said second figure, and Fig. 5 a detail plan view illustrating aninverted lower jaw of a clamp constituting part of the machine.

Referring by letter to the drawings, A represents one and A the othersection of a rectangular frame constituting the base of mygrinding-machine. Section A of the baseframe is shown as having the endsof its side bars in the form of housings made to straddle and fit snuglyon thickened pyramidal ends 0 of the side bars of the other section A,and

these engaging ends of the side bars are bolted together. By providingthe housing b with longitudinal slots, as herein shown, provision is hadfor adjustable connection of the baseframe sections, and the same resultcould be obtained by providing the pyramidal ends of the sect-ion A withsimilar slots.

While I have shown and described a practical detachable and adjustableunion of the base-frame sections, the same result may be obtained invarious ways, and the main object of this construction is to provide forknockdown shipment of the base and parts in connection therewith.

Whether made in sections or otherwise the base-frame is provided with agrooved crossbar 0 adjacent to one of its ends and flush with the upperedges of the sides. The groove in the aforesaid cross-bar is in adirection longitudinally of the base-frame, and engaging this groove isa triangular knife-edge rib d on the under side of a plate D, connectinga pair of parallel standards E E, this plate and the standards beinghereinafter sometimes designated by the term standard-yoke. The sides ofthe base-frame and the standard-yoke are provided with opposing outerlugs e e, bolted together, and owing to the engagement of the rib d withthe groove in cross-bar 0 it will be understood that I provide for tiltadjustment of said standard-yoke.

The standard E has its inner end provided with an eye for engagement ofa pivot-stud f, extending inward from a link F, and the other standard Eis provided with a pivot-study, extending through an eye in the innerend of a link F, spring keys or pins being engaged with said studsagainst washers to prevent displacement of said links. The links areconnected by a bar G, the three parts being in one casting, and the baris provided with a central eye g for a handle H, this handle and saideye being tapered to provide for wedging fit of one within the other. Asherein shown, the handle-eye is formed by a series of loop-swellsalternately upon opposite sides of the bar G on successive parallelplanes, as seen in Figs. 1 and 3. Therefore the mold for the rockeryokeembracing said bar and aforesaid links does not have to be cored.

The standard E is provided with a lateral outer lug h, and a hook-latcht'in pivotalconnection with a lug-opposingstop-arm t" of link F iscaught on said lug when the rocker-yoke is swung into the positionindicated by dotted lines in Fig. 1 and shown by full lines in Fig.

2, in which last-named figure the engagement of said lug h andhook-latch z is shown in dotted lines.

The outer end of link F is provided with an eye for the engagement of apivot-studj, projecting inward from a side bar I of a skeleton-framecarrier, and an opposing side bar I of this carrier is provided with aneye engaged by a stud j, extending inward from the outer end of link F,spring keys or pins being engaged with said studs against washers toprevent displacement of the carrier.

Loose on a stud-reduction of a boss J of link F in line with stud 7" isthe outwardlyextended hub of a sprocket-wheel K, and this hub isprovided with a series of radial cogs to form a pinion L in mesh with aspur-wheel M, havinga handle M, this spur-wheel being loose on a studis, extending outward from a branch E of standard E, these wheels beingheld in place on the bearing-studs by spring keys or pins in oppositionto interposed washers.

The standard E' and its branch E form a yoke in which clearance is hadfor the rotation of sprocket-wheel K and the run of a link belt Nengaged therewith, this link belt being also engaged with asprocket-pinion 0, fast on an arbor P, that has its bearings in the sidebars of the carrier above specified, these bars being joined by abrace-bar I, as best illustrated in Fig. 1. The arbor P extends outwardfrom each side bar of the carrier and has its ends reduced to formannular abutments, and these reduced ends of said arbor arescre\\'-threade il. A grinding-wheel may be held on each reduced end ofarbor P against an abutment of the latter by means of a clam p-n ut, andfor convenience one such wheel Q is shown on one end of said arbor inFig. 1.

Between the side bars of the carrier a grin ding device R for sickle-barknife-sections is made fast on arbor P, and as the grindingwheel Q orsubstitute for same is intended for grinding harrow-disks, finger-barledgerplates, or tools of various kinds each machine furnished to thetrade will. be accompanied with a complement of grinding-wheels designedfor Various grinding operations, any one of said wheels being attachableto either end of said arbor.

As herein shown, the standard E is provided with a lug u, to which oneend of a spiral tension-spring S is connected, and the other end of thisspring is hooked on a lug m of the carrier when the latter is in theposition shownin Fig. 1, the machine being then organizedforgrindingsickle-bar knife-sections, the arborP, with the grindingdevice B thereon, being driven at high speed by the gearing abovespecified. connect one end of spring S to the rockeryoke instead of thestandard-yoke.

Constituting the lower jaw of a sickle-bar clamp is a plate T, having asemispherical depending lugp, midway of its width, engaging It would bepractical to a socket-bracket (1 upon the inner side of aii end of thebase-frame forward of the parts previously set forth, and anotherdepending lug r, adjacent to that edge of the plate farthest from theformer lug, rests upon a crossbar 3 of said frame. The length of the lugr is such that the plate T has inclination in an upward direction towardthe standardyoke, and said plate and side bars of the baseframe areprovided with opposing lateral lugs t 25, bolted together, thebolt-openings in lugs 25 being curved slots, so that the aforesaid'plate may have a certain amount of rotary as well as tilt adjustment,the semispherical lug and socket-bracketqconstitutingaballand-socketjoint that permits of such adjustments. Plate T isprovided upon its upper side with triangular ledges it, that serve asrests for knife-sections of a sickle-bar, and in pivotal connection witha lug extension 12 of said plate is the other jaw T of the clamp forsaid sickle-bar, a set-nut to being run on the screw-threaded upper endof a post as, that constitutes the pivot for the latter clamp-jaw.

By having the clamp in pivotal and tilt adjustment on the base-frame andthe standard-yoke also in tilt adjustment on said frame the machine maybe set very fine for work on sickle-barknifesections, and saidbase-frame being in sections adjustably connected, as herein set forth,said machine is capable of a still finer setting for the same kind ofwork.

The machine being organized, as shown in Fig. 1, with the grinding-wheelQ omitted, the spring-controlled carrier is manipulated by its handle Hto bring grinding device R on and off knife-sections of a sickle-barheld by the clamp.

For sharpening barrow-disks or finger-bar ledger-plates a grinding-wheeldesigned for the work is made fast on an end of arbor P, and the springS being disconnected from the carrier the latter and the rocker-yoke inconnection therewith are swung over back of the standard-yoke, saidrocker-yoke being held in approximately horizontal position by engagingits latch z' with the lug h of said standardyoke, and the grinding-wheelis brought on and off the disk or plate to be ground by manipulation ofsaid carrier, it being understood that the grinding is done on theaforesaid disk or plate without detaching the same from the machine ofwhich it forms a part.

From the foregoing it will be understood that the machine abovespecified may be converted from a grinder of one kind into that ofanother without taking apart, and being accompanied by a suitablecomplement of grinding-wheels it may be utilized to sharpen a greatvariety of implements and tools common about a farm, any one of theseveral grinding-wheels being put on or taken 01f the arbor P withoutthe aid of any tool other than an ordinary monkey-wrench, and the samemay be said regarding the assembling of said machine shipped knockdownfrom the face tory.

As shown in Fig. 2, the base-frame of the machine may be provided withapertured lugs y for engagement of screws or bolts employed toconnectsaid machine with a bench or other support;

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The horizontal rectangular base-frame in two sections, one sectionhaving the ends of its side bars thickened and of pyramidal contour, theopposing ends of the other framesections being in the form of housingsin straddle fit upon said side bar ends of the former frame-section, andmeans for maintaining the union of said frame-sections.

2. The rocker-bearing standard-yoke, the adjustable sickle-bar clamp,the rocker-yoke in connection with said standard-yoke, the carrier inpivotal connection with the rockeryoke, the grinding device rotativebetween side bars of said carrier, driving mechanism for said grindingdevice, and the tensionspring for the aforesaid carrier.

3. The horizontal base comprising sections in longitudinally-adjustableconnection, the rockenbearing standard-yoke, the adjustable sickle-barclamp, a rocker-yoke in connection with said standard-yoke, the carrierin pivotal connection with the rocker yoke, the grinding device rotativebetween side bars of said carrier,driving mechanism for said grindingdevice, and the tension -'spring for the aforesaid carrier.

4:. The rocker yoke in connection with standards, the carrier in pivotalconnection with said rocker-yoke to be swung forward or back of thestandards, means for holding the rocker-yoke stationary in approximatelyhorizontal position back of said standards, the grinder-arbor mounted insaid carrier, and the drive-gear for said arbor.

5. The standard-yoke in rocker-bearing on the base, the rocker-yoke inconnection with said standard-yoke, the carrier in pivotal connectionwith said rocker-yoke to be swung forward or back of the standard-yoke,means for holding the rocker-yoke stationary in ap* proximatelyhorizontal position back of the aforesaid standard-yoke, thegrinderarbor mounted in said carrier, and the drive-gear for said arbor.

6. The standards, one of which is provided with a branch that therewithconstitutes a yoke, the rocker-yoke in connection with said standards, acarrier in pivotal connection with the rocker-yoke,the sprocket-wheelcarried by said rocker-yoke, the pinion integral with thesprocket-wheel,the driving spur-wheel mounted on an outer stud of saidstandard branch and in mesh with said pinion, the grinder-arbor mountedin the carrier and provided with the sprocket-pinion, thelink beltarranged on said sprocket-wheel and sprocket-pinion to run in the yokeof which the aforesaid standard branch forms a part, and means forholding the aforesaid rocker yoke in approximately horizontal positionbackof the afore said standards.

7. The rocker yoke in connection with standards, the carrier in pivotalconnection with the rocker-yoke to be swung forward or back of saidstandards, means for holding said rocker-yoke in approximatelyhorizontal position back of the standards, the arbor mounted in thecarrier and extended therefrom for attachment of a grinding-wheel, thegrinding device for sickle-bar knife-sections permanent on said arborbetween side bars of said carrier, the drive-gear for the arbor, thesicklebar clamp arranged forward of said standards, and thetension-spring attachable to the aforesaid carrier.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in the county of Milwaukee and State of Wisconsin, in thepresence of two witnesses.

HARRY W. BOLENS.

Witnesses:

N. E. OLIPHANT, B. O. ROLOFF.

